Abstract: A catalyst for direct decomposition removal of NOx from an exhaust gas stream to N2 and O2, the catalyst comprising a dual dispersed supported metal oxide material, which comprises MOx-CuOx dispersed on a CO3O4 spinel oxide support, wherein M is selected from the group consisting of Zn, Ce, Mg, Tb, and Gd. The dual dispersed supported metal oxide catalysts have good activity and selectivity for N2.

Abstract: A composite material having a black pigment and a textile material. The composite material has a reflectivity toward near infrared electromagnetic radiation having a wavelength from 800 nm to 2500 nm of greater than or equal to 12%, and the composite material has a reflectivity toward visible light having a wavelength from 350 nm to 750 nm of less than or equal to 10%.

Abstract: A catalyst for direct decomposition removal of NOx from an exhaust gas stream to N2 and O2, the catalyst comprising a dual dispersed supported metal oxide material, which comprises MOx—CuOx dispersed on a CO3O4 spinel oxide support, wherein M is selected from the group consisting of Zn, Ce, Mg, Tb, and Gd. The dual dispersed supported metal oxide catalysts have good activity and selectivity for N2.

Abstract: A composite material including a black pigment and a textile material. The composite material has a reflectivity toward near infrared electromagnetic radiation having a wavelength from 800 nm to 2500 nm of greater than or equal to 12%, and has a reflectivity toward visible light having a wavelength from 350 nm to 750 nm of less than or equal to 10%. The composite material also has a blackness (My) from 125 to 165.

Abstract: An oxygen storage material (OSM) includes a zinc manganese iron oxide (ZMF) and an alkali metal base on the ZMF surface. The ZMF has a spinel structure. The alkali metal containing ZMF can be formed to have a weight percent of alkali metal up to about two percent. The alkali metal carbonate is retained on the ZMF surface upon heating to a temperature greater than 1,000° C. and stabilizes the ZMF to the cycling of an oxygen rich and oxygen lean atmosphere. The OSM additionally catalyzes the oxidation of hydrocarbons and CO and catalyzes the reduction of NOx for use in catalytic converters.

Abstract: Catalyst material composed of a sodium incorporated cerium-zirconium based mixed oxide catalyst material, such as Ce—Zr/Al2O3, for oxygen storage capacity applications. The sodium incorporated cerium-zirconium based mixed oxide catalyst material is synthesized by co-precipitation techniques using sodium carbonate as the precipitating agent and exhibits a high oxygen storage capacity.

Abstract: Methods of making an iron based catalyst using microwave hydrothermal synthesis are provided. The methods include dissolving iron(III) nitrate, Fe(NO3)3, in an organic solvent to form a solution. Once dissolved, the methods include a step of neutralizing the solution with an alkaline mineralizing agent to obtain a precipitate. The solution with the precipitate is then subjected to microwave radiation to cause a temperature gradient and a hydrothermal crystallization process to form a synthesized product. The synthesized product is subsequently separated from the mineralizing agent. The method includes washing and drying the synthesized product to obtain particles of sodium iron oxide (NaFeO2) catalyst that can be used as a composition for a passive NOx adsorber. A two-stage NOx abatement device for removal of NOx from an exhaust gas stream during a cold start operation of an internal combustion engine is also provided.

Abstract: An oxygen storage material (OSM) includes a zinc manganese iron oxide (ZMF) and an alkali metal base on the ZMF surface. The ZMF has a spinel structure. The alkali metal containing ZMF can be formed to have a weight percent of alkali metal up to about two percent. The alkali metal carbonate is retained on the ZMF surface upon heating to a temperature greater than 1,000° C. and stabilizes the ZMF to the cycling of an oxygen rich and oxygen lean atmosphere. The OSM additionally catalyzes the oxidation of hydrocarbons and CO and catalyzes the reduction of NOx for use in catalytic converters.

Abstract: Catalyst for oxygen storage capacity applications that include a zinc doped manganese-iron spinel mixed oxide material. The zinc doped manganese-iron spinel mixed oxide material may be synthesized by a co-precipitation method using a precipitation agent such as sodium carbonate and exhibits a high oxygen storage capacity.

Abstract: An improved catalyst system is provided for the direct decomposition removal of NOx from an exhaust gas stream at temperatures between about 350° C. and about 600° C. that employs an (amorphous CuOx)/Co3O4 catalyst. The catalyst has an amorphous CuOx deposit on the surfaces of particles of Co3O4 spinel oxide. The catalyst is configured to reduce NOx to N2 without the presence of a reductant. The (amorphous CuOx)/Co3O4 catalyst is formed by the precipitation of the deposit from solution onto a suspension of Co3O4 spinel oxide particles. The catalyst system can be employed in a catalytic converter for the direct decomposition removal of NOx from an exhaust gas stream flowing at a temperature of less than or equal to about 500° C.

Abstract: NOx abatement compositions include cobalt oxide (Co3O4) doped with cerium, and have an overall formula Co3-xCe-O4, with cerium occupying tetrahedral and/or octahedral sites in the spinel structure. The NOx abatement compositions possess NOx storage and NOx direct decomposition activity. Dual stage NOx abatement devices include an upstream portion having the NOx abatement composition to adsorb and store NOx at low temperature, and then release the NOx at higher temperature to a downstream catalytic conversion portion.

Abstract: Passive NOx adsorption (PNA) compositions have a formula Pd—NiFe2O4 wherein Pd represents a palladium component, such as palladium oxide, that is adsorbed on surfaces of the nickel ferrite. Such compositions can be synthesized by wet impregnation of nickel ferrite with a palladium salt, and exhibit efficient NOx adsorption at low temperature, with NOx desorption occurring predominantly at high temperature. Two-stage NOx abatement catalysts, effective under engine cold start conditions, include a PNA composition upstream from an NOx conversion catalyst.

Abstract: Catalyst for oxygen storage capacity applications that include a zinc doped manganese-iron spinel mixed oxide material. The zinc doped manganese-iron spinel mixed oxide material may be synthesized by a co-precipitation method using a precipitation agent such as sodium carbonate and exhibits a high oxygen storage capacity.

Abstract: Catalysts for passive NOx absorber to remove NOx from exhaust gas system during engine cold start operation having high storage capacity and ideal desorption properties. The catalysts may include a system having an alumina supported Pt/Ce—Zr mixed oxide catalysts material synthesized by deposition co-precipitation using a precipitation agent selected from the group consisting of ammonium hydroxide (NH4OH), ammonium carbonate ((NH4)2CO3), sodium hydroxide (NaOH), sodium carbonate (Na2CO3).

Abstract: An improved catalyst system is provided for the direct decomposition removal of NOx from an exhaust gas stream at temperatures between about 350° C. and about 600° C. that employs an (amorphous CuOx)/Co3O4 catalyst. The catalyst has an amorphous CuOx deposit on the surfaces of particles of Co3O4 spinel oxide. The catalyst is configured to reduce NOx to N2 without the presence of a reductant. The (amorphous CuOx)/Co3O4 catalyst is formed by the precipitation of the deposit from solution onto a suspension of Co3O4 spinel oxide particles. The catalyst system can be employed in a catalytic converter for the direct decomposition removal of NOx from an exhaust gas stream flowing at a temperature of less than or equal to about 500° C.

Abstract: Catalysts including multi-transition metal doped copper-cobalt spinel mixed oxide catalyst materials for direct NOx decomposition with selectivity to N2 from combustion engine exhaust, while minimizing formation of the N2O product. In one example, the catalyst may include a ternary zinc-doped copper-cobalt spinel material or a quaternary manganese+zinc doped copper-cobalt spinel material. The catalysts are effective for reducing NO to N2 at suitable temperatures of 350-500° C., with and without excess O2 presence.

Abstract: Catalysts including multi-transition metal doped copper-cobalt spinel mixed oxide catalyst materials for direct NOx decomposition with selectivity to N2 from combustion engine exhaust, while minimizing formation of the N2O product. In one example, the catalyst may include a ternary zinc-doped copper-cobalt spinel material or a quaternary manganese+zinc doped copper-cobalt spinel material. The catalysts are effective for reducing NO to N2 at suitable temperatures of 350-500° C., with and without excess O2 presence.

Abstract: Catalyst material composed of a sodium incorporated cerium-zirconium based mixed oxide catalyst material, such as Ce—Zr/Al2O3, for oxygen storage capacity applications. The sodium incorporated cerium-zirconium based mixed oxide catalyst material is synthesized by co-precipitation techniques using sodium carbonate as the precipitating agent and exhibits a high oxygen storage capacity.

Abstract: Catalyst for passive NOx absorber to remove NOx from exhaust gas system during engine cold start operation having high storage capacity and ideal desorption properties. The catalyst may include a mixed oxide catalyst system having a Pt promoted Ce0.5Zr0.5O2 catalyst material synthesized by co-precipitation using ammonium carbonate as a precipitation agent.

Abstract: Catalyst material comprising a ternary spinel mixed oxide for treatment of an exhaust gas stream via direct decomposition removal of NOx to N2 and O2. The low temperature (from about 400° C. to about 650° C.), direct decomposition is accomplished without the need of a reductant molecule. In one example, Mn may be incorporated into metal oxide, such as CuyCo3-yO4 spinel oxide, synthesized using co-precipitation techniques.